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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Lemi Orhan Ergin‏ @lemiorhan 28 Nov 2017
      • Report Tweet
      • Report NetzDG Violation

      Dear @AppleSupport, we noticed a *HUGE* security issue at MacOS High Sierra. Anyone can login as "root" with empty password after clicking on login button several times. Are you aware of it @Apple?

      990 replies 10,902 retweets 14,076 likes
      Show this thread
    2. Phil Dokas‏ @dokas 28 Nov 2017
      • Report Tweet
      • Report NetzDG Violation
      Replying to @lemiorhan @AppleSupport @Apple

      You did privately disclose this to them first, right?

      6 replies 4 retweets 82 likes
    3. Brett‏ @rem1nd_ 28 Nov 2017
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      Replying to @dokas @lemiorhan and

      You didn’t just tell a guy who found something what to do with his finding, right?

      1 reply 0 retweets 59 likes
    4. Phil Dokas‏ @dokas 28 Nov 2017
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      Replying to @rem1nd_ @lemiorhan and

      Responsible disclosure is the most important part of disclosure.

      4 replies 5 retweets 171 likes
    5. Hector Martin‏ @marcan42 28 Nov 2017
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      Replying to @dokas @rem1nd_ and

      Responsible disclosure is a choice, not a requirement. Heck, half the time it doesn't even work at all and makes everyone less safe by delaying action. In this case? The vuln is trivial enough and embarrassing enough (but limited; needs local access) that I'd say it's a wash.

      2 replies 2 retweets 28 likes
    6. Michael Graziano‏ @voretaq7 28 Nov 2017
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      Replying to @marcan42 @dokas and

      This does not require local access. It's exploitable remotely if "Screen Sharing" is enabled. Other sharing services may also be affected (authentication bypass).

      1 reply 2 retweets 2 likes
    7. Hector Martin‏ @marcan42 28 Nov 2017
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      Replying to @voretaq7 @dokas and

      By that do you mean the authentication bypass on the *initial* connection to the screen or just escalation once already connected?

      1 reply 0 retweets 1 like
    8. Michael Graziano‏ @voretaq7 28 Nov 2017
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      Replying to @marcan42 @dokas and

      For Screen Sharing it's both: You can auth as root in the initial request, which gets you to the regular login screen (also affected by the bug, so you can log into a desktop session as root)

      2 replies 2 retweets 4 likes
      Hector Martin‏ @marcan42 28 Nov 2017
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      Replying to @voretaq7 @dokas and

      That's pretty fucked up; implies the problem is deep in the bowels of the authentication system. Has anyone tried SSH? Still, this is so ridiculous (and trivial to find) I wouldn't have given them more than 14 days to fix and roll out the fix before full disclosure.

      1:32 PM - 28 Nov 2017
      • 1 Retweet
      • 3 Likes
      • Nick Sweeting Thomas A Myria OutrageousCoder
      0 replies 1 retweet 3 likes

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